Assume that you send an IDOC from BizTalk Server to SAP by using the BizTalk Server SAP Adapter. If the input XML message has data fields in a different order than what is defined in the IDOC definition in SAP, the IDOC that is generated by BizTalk Server cannot be consumed by SAP correctly.
Cumulative update information
For BizTalk Server 2016
The fix that resolves this issue is included in Cumulative Update 5 for BizTalk Server 2016.
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.
The third-party products that this article discusses are manufactured by companies that are independent of Microsoft. Microsoft makes no warranty, implied or otherwise, about the performance or reliability of these products.